Implemented the following work items:

test/harness/helper.js

website/harness/helper.js

website/json/default.json

website/json/testcases_bestPractice.json

website/json/testcases_ch07.json

website/json/testcases_ch08.json

website/json/testcases_ch09.json

website/json/testcases_ch10.json

website/json/testcases_ch11.json

website/json/testcases_ch12.json

website/json/testcases_ch13.json

website/json/testcases_ch14.json

website/json/testcases_ch15.json

website/json/testcases_intl402.json